ESTUDY
PADI ENRICHED AIR DIVER EXAM NEWEST VERSION
2025/2026 UPDATE QUESTIONS WITH VERIFIED
ANSWERS GRADED A+ | WITH RATIONALES
1. What is the primary benefit of diving with enriched air?
o a. It increases your buoyancy.
o b. It exposes you to less nitrogen.
o c. It allows for deeper dives safely.
o d. It decreases the weight of equipment.
Rationale: Enriched air contains a higher percentage of oxygen, resulting in less nitrogen
being absorbed by the body.
2. When diving with enriched air nitrox, for a given depth you should expect narcosis to be:
o a. The same as
o b. Less than
o c. Greater than
o d. Reduced significantly
Rationale: Narcosis is affected by the partial pressure of nitrogen, which is consistently
present in both air and nitrox.
3. Advantages of using a dive computer with enriched air nitrox include that:
o a. It adds multilevel diving advantages for the longest no-stop dive time, and most
models will warn you if you exceed the maximum depth for your gas blend.
o b. It only tracks time underwater.
o c. It is necessary for shallow dives.
o d. It replaces the need for a dive table.
Rationale: Dive computers specifically designed for nitrox provide detailed logs and
alerts regarding maximum depth and bottom time.
4. The general recommendation for scuba equipment (other than your cylinder) used with
enriched air is:
o a. Everything can be used normally just as it is with air.
, ESTUDY
o b. All equipment must be replaced.
o c. Special lubricants must be used.
o d. Equipment should be checked every dive.
Rationale: Standard scuba equipment is compatible with enriched air, allowing it to be
used as usual.
5. True or False: Some SCUBA manufacturers have special recommendations or requirements that
you should follow when using their equipment with enriched air nitrox.
o a. True
o b. False
Rationale: Different manufacturers may have specific guidelines for using enriched air
with their equipment to ensure safety.
6. Nitrox requires a dedicated cylinder because:
o a. It is heavier than regular air.
o b. It's important no one accidentally confuses it with an air cylinder.
o c. It is more expensive.
o d. It requires special certification.
Rationale: Dedicated cylinders help prevent mix-up, which could lead to serious diving
accidents.
7. In what areas would you expect enriched air cylinders to have a green or green/yellow band on
the shoulder with "nitrox" or similar written on it?
o a. Only in the USA.
o b. In most areas internationally, but some regions use different markings.
o c. Everywhere in North America.
o d. Markings are not standardized.
Rationale: The color coding of nitrox cylinders can vary, but green is commonly used
internationally.
8. If an enriched air cylinder or oxygen service equipment is used with standard compressed air,
you:
o a. Should have it disposed of.
o b. Should have it serviced by a qualified professional.
PADI ENRICHED AIR DIVER EXAM NEWEST VERSION
2025/2026 UPDATE QUESTIONS WITH VERIFIED
ANSWERS GRADED A+ | WITH RATIONALES
1. What is the primary benefit of diving with enriched air?
o a. It increases your buoyancy.
o b. It exposes you to less nitrogen.
o c. It allows for deeper dives safely.
o d. It decreases the weight of equipment.
Rationale: Enriched air contains a higher percentage of oxygen, resulting in less nitrogen
being absorbed by the body.
2. When diving with enriched air nitrox, for a given depth you should expect narcosis to be:
o a. The same as
o b. Less than
o c. Greater than
o d. Reduced significantly
Rationale: Narcosis is affected by the partial pressure of nitrogen, which is consistently
present in both air and nitrox.
3. Advantages of using a dive computer with enriched air nitrox include that:
o a. It adds multilevel diving advantages for the longest no-stop dive time, and most
models will warn you if you exceed the maximum depth for your gas blend.
o b. It only tracks time underwater.
o c. It is necessary for shallow dives.
o d. It replaces the need for a dive table.
Rationale: Dive computers specifically designed for nitrox provide detailed logs and
alerts regarding maximum depth and bottom time.
4. The general recommendation for scuba equipment (other than your cylinder) used with
enriched air is:
o a. Everything can be used normally just as it is with air.
, ESTUDY
o b. All equipment must be replaced.
o c. Special lubricants must be used.
o d. Equipment should be checked every dive.
Rationale: Standard scuba equipment is compatible with enriched air, allowing it to be
used as usual.
5. True or False: Some SCUBA manufacturers have special recommendations or requirements that
you should follow when using their equipment with enriched air nitrox.
o a. True
o b. False
Rationale: Different manufacturers may have specific guidelines for using enriched air
with their equipment to ensure safety.
6. Nitrox requires a dedicated cylinder because:
o a. It is heavier than regular air.
o b. It's important no one accidentally confuses it with an air cylinder.
o c. It is more expensive.
o d. It requires special certification.
Rationale: Dedicated cylinders help prevent mix-up, which could lead to serious diving
accidents.
7. In what areas would you expect enriched air cylinders to have a green or green/yellow band on
the shoulder with "nitrox" or similar written on it?
o a. Only in the USA.
o b. In most areas internationally, but some regions use different markings.
o c. Everywhere in North America.
o d. Markings are not standardized.
Rationale: The color coding of nitrox cylinders can vary, but green is commonly used
internationally.
8. If an enriched air cylinder or oxygen service equipment is used with standard compressed air,
you:
o a. Should have it disposed of.
o b. Should have it serviced by a qualified professional.
